Turn off every light. When you tap a cell, it toggles AND its four neighbors flip too. Solve every puzzle by making them dark.
🎯 GoalTurn off every light. Tapping a square toggles it and its 4 neighbors.
🎮 ControlsClick or tap a square to flip it and the squares above, below, left, and right. Press Hint if you're stuck.
💡 TipEvery starting puzzle has a solution — try the top row first, then chase the rest.
What students learnLogical deduction: every tap flips its neighbors, so order and parity matter.
Try in classPair challenge: fewest moves on a 3×3. Ask: does tapping a square twice change anything?